Before adding blobs a blobtable must be created. Blob tables can be
sharded. This makes it possible to distribute binaries over multiple nodes.
Lets use the CrateDB shell crash to issue the SQL statement:

It is possible to define a custom directory path for storing blob data which
can be completely different than the normal data path. Best use case for this
is storing normal data on a fast SSD and blob data on a large cheap spinning
disk.

The custom blob data path can be set either globally by config or while
creating a blob table. The path can be either absolute or relative and must be
creatable/writable by the user CrateDB is running as. A relative path value is
relative to CRATE_HOME.